Which Weapon Is Better?

I am an assasin, I use full adventurer gear.

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Im assuming Stabsand cause its legendary but idk

 

Stabsand is better because it has more base damage and lifesteal although you could keep scalpel as a secondary if you need to regen health
also, when you get to do sand-swept tomb around 5~ times, you should get the hashr claw from the dungeon shop, it's a pretty good dagger that'll last you until at least lv 60

also please post questions in the questions sections of the forums ty